Rank: Member
Groups: Registered
Joined: 10/28/2008(UTC)
Posts: 75
Was thanked: 1 time(s) in 1 post(s)
|
Can someone explain how the newer compressors run? They seem to use PTC devices to start the compressor. Part Details - GE 5sp overload/ptc, part number: AP3796513It has been a long time, since I went to trade school. I remember being able to just flip over a start relay to check it for continuity. The PTC devices are solid state. I don't even remember domestic refrigerators utilizing run caps. Is the capacitor mounted on the back for starting or a run cap? Do PTC devices fully drop out the start winding, or does it utilize the run cap through the start winding like a PSC motor? One more thing, a PSC compressor will not start and run without the run cap. I was reading a thread where some techs will use the 3 n 1 and not add the run cap. This causes extra strain on the windings, but the compressor will still run. Sorry for all the questions.
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 10/28/2008(UTC)
Posts: 75
Was thanked: 1 time(s) in 1 post(s)
|
I'll try to clarify my initial post. I know how PTC devices work with starting device with start cap inline (superboost or 3 n 1). They drop out the start cap completely. It seems like these new compressors are now using PTC devices to start compressor, but they allow current through the run cap after startup. I believe it is a run cap in the device I am trying to order. It is only a 15mfd capacitor. Can someone enlighten me on how exactly this device utilizes the run cap?
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 10/28/2008(UTC)
Posts: 75
Was thanked: 1 time(s) in 1 post(s)
|
Does this part utilize the capacitor as a start cap or a run cap?
|
|
|
|
|
|
Rank: Advanced Member
Groups: Senior Expert
Joined: 9/10/2007(UTC)
Posts: 9,586
Was thanked: 2 time(s) in 2 post(s)
|
The run capacitor sends a small current to the start winding to increase the running torq and prevent compressor stall during brownouts.
Never use a 3n1 start device on the newer 1/5 hp compressors, will burn them out.
|
|
|
|
|
|
Forum Jump
You can post new topics in this forum.
You can reply to topics in this forum.
You can delete your posts in this forum.
You can edit your posts in this forum.
You cannot create polls in this forum.
You can vote in polls in this forum.
Important Information:
The AppliancePartsPros.com uses cookies. By continuing to browse this site, you are agreeing to our use of cookies.
More Details
Close
